Steam-boiler.



UNITED sTATns PATENT oFFroE- INGEBRIGT J. uLLENsAKER, or HATToN, NORTH DAKoTA.

i STEAM-BOILER. i

` Specification of Letters Patent.

Patented Jan. 8, 1907'.

Application filed May ll, 1906. Serial 110.316,410.

To all whom t may concern:

Be it known that I, INGEBRIGT J. ULLEN- sAKER, a citizen of the United States', residing at Hatton, in the county of Traill and State of North Dakota, have invented certain new and usefullmprovements in Steam- Boilers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to improvements in steam-boilers of the fire-flue type; and it consists in the novel construction, combination, and arrangement of parts hereinafter described and claimed.

The object of the invention is to provide a boiler of this character of simple, durable, and` inexpensive construction in which the heat of the fuel will be more fully utilized and the boiler thus rendered more eflicient than those now in use. 4

Further objects and advantages of the invention, as well as the structural features by means of which they are attained, will be -made clear by an examination of the following specification, taken in connection with the accompanying drawings, in which similar reference characters denote corresponding parts throughout the several views, and in which- Figure y1 is a vertical longitudinal sectional view through a steam-boiler constructed in accordance with my invention; and Figs. 2 and 3 are vertical transverse sectional views taken, respectively, on the planes indicated by the lines 2 2 and 3 3 in Fig. 1.

. Referring to the drawings by numeral, 1 denotes the cylindrical shell or casing of the boiler, which has the smoke space or box at its front end divided by a transversely-extending partition 2 into lower and upper smoke-chambers 3 and'4. The partition 2 is inclined downwardly and rearwardly and is rigidly' mounted in the front end of the casing. The casing or shell at its rear is enlarged and of rectangular form, and in it is provided the usual ash-pit 5, which is separated by the fire-grate 6 from the fire box or chamber 7. A front smoke-chamber 8 is formed in the top of this rear portion of the casing by a transversely-extending partition 9, which separates it from the fire-box 7. The partition 9 is inclined downwardly and forwardly and is rigidly mounted, as shown. The usual doors 10 and 11 are rovided in the rear .wall of the ash-pit and re-box, and a similar door 12 is provided to enable the `them of fire-brick, as illustrated in the drawings.

Extending longitudinally through the water and steam space 13'of the boiler, at the top of which space is the usual steam-dome, is a lower large or main fire-Hue 14 and two orA more smaller iire-flues 15. `The flues 14 and 15 carry the ire, heat, smoke, and products of combustion forwardly from the fire-box 7 into the lower rear smoke-chamber 3, and they are carried rearwardly from the latter and into the front smoke-chamber 8 through a horizontal row or series of longitudinal smoke-flues 16, preferably five in number. From the chamber 8 the smoke, &c., again passes forwardly through a third horizontal row or series of smoke-lines consisting of an upper large or main one 17 and a number of smaller ones 18. The iiues 17 and 18 discharge into the upper front smoke-chamber 4, from the top of which latter projects a smoke-stack 19. By constructing the boiler in this manner, so that theA heat, smoke, gases, and products of combustion will pass three times through the boiler, all of the heat will be utilized and a much more efficient boiler is produced at a comparatively small increase in cost over that of the boilers now in general use.

From the foregoing description, taken in connection with the accompanying drawings,

it is thought that the construction, opera- IOO IOSy

transversely-extending stationary partition lixed in the front end of said casing and inclined downwardly` and rearwardly to divide it into upper and lower smoke-chambers, a transversely-extending stationary partition xed in the enlarged rear portion of said casing above the Ere-grate therein and inclined downwardly and forwardly to separate its shown and described. ire box or chamber from the upper rear In testimony whereof I hereunto affix my smoke-chunber, a smoke-smeg leading ron signature in presence of two witnesses.

the to o the u er smoke-e amber at t e Y T fronty opi the easing) a door closing a clean-out INGEBRIGT J' ULLILA SAKER' open'ing'atv the lend of the upper rear smoke- Witnesses: chamber, and three horizontal rows of ire GEORGE MURRAY,

flues aording communication between the EDWIN P. STILL.

said chambers of the easing, substantially as ro 

